AS27C256-15ECA 参数 Datasheet PDF下载

UVEPROM

Austin Semiconductor, Inc.

256K UVEPROM

UV Erasable Programmable

Read-Only Memory

AVAILABLE AS MILITARY

SPECIFICATIONS

• -55C to 125C operation

• MILITARY Processing Method MIL-PRF-38535, Class Q

• Commercial Version Available

AS27C256

PIN ASSIGNMENT

(Top View)

28-Pin DIP (J)

(600 MIL)

V

PP

A12

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

Vcc

A14

A13

A8

A9

A11

G\

A10

E\

DQ7

DQ6

DQ5

DQ4

DQ3

FEATURES

Organized 32,768 x 8

Single +5V ±10% power supply

Pin-compatible with existing 256K ROM’s and EPROM’s

All inputs/outputs fully TTL compatible

Power-saving CMOS technology

Very high-speed FLASHRITE Pulse Programming

3-state output buffers

400-mV DC assured noise immunity with standard TTL

loads

• Latchup immunity of 250 mA on all input and output pins

• Low power dissipation (CMOS Input Levels)

-Active - 165mW Worst Case

-Standby - 1.7mW Worst Case (CMOS-input levels)

* FUTURE High Speed Offerings: 55ns, 70ns, 90ns

•

•

•

•

•

•

•

•

32-Pin LCC (ECA)

(450 x 550 mils)

A7

A12

A12

A14

6

A10

V

PP

NC

NC

V

CC

V

CC

A15

A14

CE2

A13

4 3 2 1 32 31 30

OPTIONS

• Timing

120ns access

150ns access

170ns access

200ns access

250ns access

300ns access

55ns access

70ns access

90ns access

MARKING

-12

-15

-17

-20

-25

-30

-55

-70

-90

A6

5

A7

A5

6

A6

A4

7

A5

A3

8

A4

A2

9

A3

A2 10

A1

A1 11

A0

A0 12

NC

DQ1 13

DQ0

29

A8

\

WE

28

A9

A13

27

A11

A8

26

NC

A9

25

G\

A11

24

A10

\

OE

23

E\

A10

22

DQ7

\

CE1

21

DQ6

DQ8

14 15 16 17 18 19 20

Pin Name

Pin

A14

A0 -

Name

DQ0-DQ7

E\

G\

GND

V

CC

Address

Inputs (programming)/Outputs

Chip Enable/Power Down

Output Enable

Ground

5V Supply

13V Programming Power Supply

• Package(s)

Ceramic DIP (600mils) J

No. 110

Ceramic LCC (450 x 550 mils) ECA No. 208

• Processing / Operating Temperature Ranges

Full Military (-55

o

C to +125

o

C)

M

Industrial (-40°C to +85°C)

I

o

o

Military Temp (-55 C to +125 C) XT

V

PP

For more products and information

please visit our web site at

www.austinsemiconductor.com

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

AS27C256

Rev. 2.0 7/06

1

DQ1

DQ2

DQ2

DQ3

V

SS

GND

DQ4

NC

DQ5

DQ3

DQ6

DQ4

DQ7

DQ5

Function

Function

Inputs